Everyone here seems to be thinking about what happens to themselves after they die. I think all of you should be much more concerned about what happens to you after
I die.
The question of what happens after one dies seems to me to be a question of the fundamental nature of reality. If all of this is just a passing dream of mine, y'all are in sorry shape when I wake up.
As I've posted elsewhere, I think that reality is neither completely objective, nor a totally subjective hallucination. I think it's an interactive, and dynamic chaotic system. One's world view has a huge impact on one's life. Rather than simply being actors on this world stage, we're all co-authors.
This being said, I think that in this constantly changing and interconnected universe there are elements of reality that exist independent of all other things, and all ideas about them. I think that such an element exists in everyone. In me, I like to think of it as that part of me which is the "I" in "I am." I'm young, so self-discovery and self-definition is a big theme for me.
I've tried defining myself in the past in terms of what I do, or other temporary things. I came to the realization that its none of those things. If I were in some awful accident and lost limbs, would I be any less me? No, I don't think so. What if in this accident, I were put into a coma? What then? No, still I don't think my core self would be diminished. My capacity to interact with the outside world would be dramatically reduced, and others would be far less able to infer my experience from my behavior, but that does not mean my experience would stop.
What if I was still conscious, but suffered severe brain damage? What about insanity? If my thinking were disrupted, would I be any less me? No, I don't believe so. My thoughts have changed throughout my life, my core beliefs, and whatnot, but I have always, and will always be me. The outside features, important to me, sometimes blindingly so, are impermanent and will change. The core element of reality in me remains.
I think that these quintessential fragments of reality are just that, fragments, part of a possible greater whole. I think that they interact with other fragements on a frequent basis. I think that is what true love is, acknowledging that sliver of reality in someone else. Truly knowing that they are a real, and unique creature.
It is possible that when we die these fragments rejoin some greater whole, or let go of the outer shell to weave a new form out of the shifting fabric of this reality, or any number of other things. As I've said before, I think that we write the story as we go along, and that what happens to that fragment is truly up to us.
In my view, I think that my core self has chosen to craft this form in order to interact with the reality around it. And it has chosen to do that so that it may learn. Completely cut off from outside experience, it's impossible to grow, and to gain new knowledge. I think that it's done this before, and will likely do it again. When it finishes, or wants to take a break, it can rejoin the greater whole, and disseminate the gained information, and benefit from the experiences of others.
As I've said, this is just my personal theory, and it could be totally wrong. I'll find out eventually, but I'm in no hurry.

If the doors of perception were cleansed everything would appear to Man as it is: infinite. --William Blake